.hero{display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;height:80vh;background:url(https://t3.ftcdn.net/jpg/07/53/20/82/360_F_753208233_2tFjybdyLCTU12MEJfguSJKBtl0sG5pj.jpg);background-size:cover;background-position:50%;color:white;padding:20px}.hero h1{font-size:3rem;font-weight:700;margin-bottom:20px}.hero p{font-size:1.5rem;margin-bottom:30px}.hero-buttons{display:flex;gap:20px}.cta-button{padding:10px 20px;font-size:1rem;color:#0047ab;background-color:#ffcc00;text-decoration:none;border-radius:5px;transition:background-color .3s ease}.cta-button:hover{background-color:#e6b800}@media (max-width:768px){.hero{height:60vh;padding:15px}.hero h1{font-size:2.5rem}.hero p{font-size:1.2rem}.cta-button{font-size:.9rem;padding:8px 16px}}@media (max-width:480px){.hero h1{font-size:2rem}.hero p{font-size:1rem}.cta-button{font-size:.8rem;padding:6px 12px}}.testimonials{padding:40px 20px;background-color:#f0f8ff;text-align:center}.testimonials h2{font-size:2rem;color:#0047ab;margin-bottom:20px}.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.testimonial-card{background-color:#ffffff;padding:20px;border-radius:10px;box-shadow:0 4px 6px rgba(0,0,0,.1)}.testimonial-card p{font-size:1rem;color:#555;margin-bottom:10px}.testimonial-card h4{font-size:1.2rem;color:#0047ab}.popular-subjects{padding:40px 20px;text-align:center}.popular-subjects h2{font-size:2rem;color:#0047ab;margin-bottom:20px}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.subject-card{background-color:#f9f9f9;padding:20px;border:1px solid #ddd;border-radius:10px;box-shadow:0 4px 6px rgba(0,0,0,.1);text-align:center}.subject-card h3{font-size:1.5rem;color:#0047ab;margin-bottom:10px}.subject-card p{font-size:1rem;color:#555;margin-bottom:15px}.explore-button{padding:10px 20px;font-size:1rem;background-color:#0047ab;color:white;border:none;border-radius:5px;cursor:pointer;transition:background-color .3s ease}.explore-button:hover{background-color:#003580}